Improving the Efficiency of an Overhead Crane Feeding from a Trolley's Line under Conditions of Higher Current Harmonics

A simulation model of interconnected electromagnetic processes between electric drives of an overhead crane moving mechanism (with relay-contactor system and frequency converter) and current-conducting elements of the power supply system of an overhead crane has been developed. The interconnected electromagnetic processes between electric drives of overhead crane moving mechanism and busbar's trolleys have been researched. The voltage loss relationships in the trolleys at the moment of the asynchronous electric drive have been established. Determined the maximum allowable distance of the overhead crane to the feeding point of the trolley section of the busbar, which provides trouble-free operation of the overhead crane electric drive, as well as the number of feeding points of the busbar trolley sections and the distance between them, which will ensure the same level of losses at the fundamental harmonic current. Recommendations to reduce voltage losses and active losses in the busbar's trolley from the action of higher current harmonics were developed.